The piece that is most valuable from the Mimecast standpoint will be the sandboxing feature.
Mimecast Email Security reduces phishing emails and filters out spam, offering features like impersonation protection, sandboxing, content filtering, secure messaging, journaling, and email archiving. Integration with Microsoft 365 enhances user access, though detection rates and filtering flexibility need improvement. Pricing is considered high, with extraction fees for archived data. Response times for new threats could be faster, and outbound mail servers are often blocklisted, impacting reputation.